Automatic stoker



Oct. 29, 1929. MARTINCICH 1,733,746

AUTOMATI C STOKER Filed July 16, 1927 5 Sheets-Sheet 1 2 INVENTOR:

i m w ATTORNEYS.

Oct. 29, 1929. c, MARTlNclcH I 1,733,746

AUTOMATIC STOKER Filed July 16, 1927 5 Sheets-Sheet 2 fit INV [:ITOFI:

ATTORNEYS.

Oct. 29, 1929 Q Nc c 1,733,746

AUTOMATIC STOKER Filed July 16,1927 5 sheets-sheet s f ,INVENTQR:

Oct. 29, 1929. c. MARTINCICH AUTOMATI C STOKER Filed July 16, 1927 5Sheets-Sheet 4 INVENTOR:

ATTO R N EYS Oct. 29, 1929. Q c c'H 1,733,746

AUTOMATIC STOKER Filed July 16, 1927 5 Sheets-Sheet 5 a ATTQRNEYS.

I 15 door or other inlet of Patented Oct. 29, 1929 UNITED STATES PATENTOFFICE AUTOMATIC sroxna Application filed July 16,

My invention relates to a new and useful automatic stoker for furnacesand the like and more'particularly, to a stoker adapted to feed solid,pulverized or other fuel such as coal or the like into the fire box of afurnace, automatically and at predetermined intervals and whereby -auniform distribution of the coalon the fire bed "is assured.

My invention further relates to an automatic stoker adapted to bedetachably mounted on the door of a fire box and adapted to be reliedupon exclusively for the purpose of replenishing the fuel, at the sametime permittingof the independent use of such said fire box forremanner. I

relates to a power and one which is automatic adjustfueling in theordinary My invention further driven automatic stoker, capable of manualand ment and control.

My invention further consists of various other novel features ofconstruction and advantage as will be hereinafter pointed out in thespecification and claims appended hereto.

Forthe purpose of illustrating my invention, I have shown in theaccompanying. drawings one form thereof which is at present preferred byme, since the same has beenfound in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumentalities of which my invention consists can be variouslyarranged and organized and that my in-'- vention is not limited to theprecise arrangement and organization of the instrumentalities as hereinshown and described.

Referring to the drawings Figure 1, represents a front elevation of anautomatic stoker embodying my invention.

' Figure 2, represents a side elevation of the same.

Figure 3, represents a vertical sectional view on line 3-3 Fig. 2certain parts-being shown in elevation. I

Figure 4, represents a vertical sectional view on line 4-4 Fig. 3.certain parts being shown in elevation. Figure-5, represents on anenlarged scale 1927. serial No. 206,265.

a perspective view of the internal intermediate valvular element and itsadjuncts.

Figure 6, represents on an enlarged scale a perspective View of theupper fuel supporting plate and its coacting valvular element. Figure 7,represents on an enlarged scale a perspective view of the dischargenozzle" in detached position.

Figures 8 and 9, represent detached per-' bottom of which is detachablysecured the inner end of the supporting bracket 7 by means of the bolt 8or the like. The position of the bracket 7 with respect to the door 2and the bracket 4 is'adjusted by sliding the bolt 8 in i a longitudinalslot in the extension 5, of the bracket 4: (see F igs. 1 and 3) Theplate 4 is further provided with the apertured lugs 6, which are adaptedto receive the locking pins or bolts 9 passing therethrough and throughthe upper and lower aligning lugs 11 on the inner edges of the housingor'casing 10, as will be understood from Figs. 1 and 2, 8 and 9. Thebracket 7 is provided with the. bearings 12 in which is journalled thedriving shaft 13, driven by any suitable'means, and

on the one end of which is fast the gear'14 in mesh with-thepinion 15,which is fast on the propeller shaft 16, journalled in the bearing 17 atone end of the housing 10 andthe bearing in the cap 18 which engages andforms a closure for the other end of the said housing, as will beunderstood from Figs. 1

and 2.

Fast on the shaft 16, and preferably integral therewith, are a series ofvertical disclike members 19 forming-a series of parallel chambers 20,within the housing 10. At right angles to said discs 1'9'and extendingthe entire length of the housing 10 is the integral propeller blade 21adapted to revolve with the rotation of the shaft 16, said shaft alsotransversely bisecting the chambers 20 formed between the parallelvertical discs 19, as will be understood from Figs. 1 and 2.

The, housing 10. extends upwardly to form s the-hopper or reservoir 22,which is adapted to receive a supply of coalfrom any suitable overheadconveyance, such as a belt or bucket chain conveyor or the like, (notshown). In the hopper 22 is secured by means of the bolts 23, theinclined upper fuel supporting tray 24 whose rear or inner end is spacedaway from the rear wall of the hopper and is provided at said inner endwith the longitudinal, manuallyoperable sliding valve 25 (shown closedin Figs. 2 and 4), which maybe opened or. closed by means of the ratchet'arm 26, the

v inner end of which detachably engages the ap'ertured lug 31 in thebottom of said valve. The arm 26' is provided on its-under side with 6the ratchet teeth or serrations 27 for engaging the wallof the aperture28 through which said arm extends to maintain said valve l in either theclosed or open position and to regulate the extent to which it may bedesired 25 to open or close said valve to control and reg- I ulate thepassage of thecoal. or other fuel therethrough. The sliding member orvalve 25 is secured to the member 24 by the pins 29, which areadapted toslide in the slots 30 so (see Fig. 6) when said valve 25 is moved to andfro by the arm 26, engaging the bottom apertured lug 31, which lug isadapted to slide in the slot 32 as will be understood from Figure 6. I8i Below the tray 24 is disposed the hopper bottom or .plate' 33 havingthe transverse fuel opening 34 therein, formed between the pendantflanges 35 thereof, and supported in position with respect to the hopper22 by means of the, side walls 36 and the bolts or I screws 37, as willbe understood from F igs. 1. 2, 3 and 4. Above the inner portionof thehopper bottom 33, that is, above the opening 34 is positioned thesliding valve 38, which is normally maintained in position to close theopening34 by the springs 39 confined between the lugs 42 on said bottomplate 33 and the lugs 41 onthevalve 38 as willbe understood from Figs.1, 2, 39nd 4. The

plate 33 is further provided with the lugs 44 to which is pivoted theupper end of the pendant lever 45, which passes through andengageswanopening 40 in said valve 38fthe withdraw said valve 38 from alignmentwith the opening 34, against the pressure of the m springs 39, to permitthe passage of the coal -througli said opening into the compartments 20intermediate the discs 19 in the lower housing 10. The lever 45 passesthrough and guided in the guide slot 40 in the plate 05 '33. The valve38 is guidedin the ways 47.

said nozzle 51 thus alternatel 5 low er end of said lever 45 beingadapted to be engaged and actuated by the cam 46 on the shaft 16, w1theach revolutlon of the latter, to the verti 6 a1 discs 19 in the lowerprovided at the ends of the member 33 as will be understood from Fig. 5.

The housing 10 is provided with an inwardly extending horizontalextension 43, the inner end of which is adapted to seat within thesupporting plate 4 011 the door 2, when the device is assembled, andwhich carries the lugs 11, above referred to, as will be understood fromFigs. 2, 4 and 7. Within the hous-' 'ing extension 43, are disposed theparallel,

longitudinal, guide partitions 48, the inner ends of which are inregistering alignment with the vertical disc 19, (see Figs. 4 and 9),said horizontal partitions 48 thus forming therebetween, parallel"channels leading from the chambers 20 into -the interior of the firebox. Near the inner end of the housing 43 is pivoted as at 50 a dis-,charge nozzle 51, from which extend rear wardly the upper and lowerlinks 52 secured to the respective ends of the vertically disposedrocker arm 53, fulcrnmed at 54 and ter-' minating in the lever arm 55.An eccentric pin 56 on the inner face of the gear 14 serves to raisesaid arm with each revolution of said gear 14, against the tension ofthe spring 57, engaging the notch58 in the end of said lever 55 and thelower supporting arm or bracket 60 as will be understood from Figure 2.When the lever arm 55 is raised'by the pin 56, the discharge nozzle 51is tipped or defiected downwardly and when the arm 55 is pulleddownwardly by the spring 57 the discharge nozzle is tilted or deflectedupwardly, y occupying the positions shown dotted in Fig. 2.

The operation is as follows The hopper 22 is'filled with fuel such ascoal from any suitable source (not shown). Any suitable driving means,such as an electric motor or the like may be employed to revolve thegear 14, which incturn revolves the pinion 15 thus imparting a rotarymovement to the shaft 16. The rod or arm 26-is then manually pulledoutwardly, thus opening the sliding valve 25 of the member 24andpermitting the passage of the "coal therethrough.

The arm 26 is maintained in any desired position with respect to theopening 28 by means of the ratchet teeth '27 thereon engaging the H wallof said opening. As the shaft 16 is revolved, the cam 46thereon engagesthe lever 45 and intermittently opens the valve 38 against the pressureof the springs 39 to permit a given amount -'of fuel to pass therethecoal uniformly over the fire. bed and to pr ent t a c m lation at anyone point either within the housing 10 or in the interior of the firebox.

Simultaneously with the rotation of the shaft 16, and blade 21, the pin56 on inner face of the gear 14 raises the rear end of the lever againstthe tension of the spring 57 and thus tilts or deflects the dischargenozzle 51' downwardly so that the coal being discharged therethrough isthrown onto the front or foremost portion of the fire bed within thefire box 2. As the gear 14 revolves, the spring 57 pulls the rear end ofsaid lever downwardly and thus deflects the discharge nozzle 51upwardly, so that the coal being discharged when said discharge nozzle51 is in this position, is thrown to the rearmost portion of the firebed thus insuring lateral and longitudinal even distribution of the fuelupon the fuel bed within the fire box. 1 The fire box 2 is also providedwith an opening 59 covered with some transparent heat resistingmaterial, so thatthe fire within the fire box may be observed from theoutside without the necessity of opening the door 2.

My entire novel device is so hinged to the door 2, of the fire box 1,that in the event of any damage to the mechanism it is merely necessaryto disconnect the driving means from the shaft 13 and then to swing thedoor 2 open on its hinges 3, and feed the coal manually until thenecessary repairs have been made. I

It will now be apparent that I have devised a novel and usefulconstruction of automatic stoker which embodies the features ofadvantage enumerated as desirable in the statement of the invention andthe above description and while I have in the present instance shown anddescribed the preferred embodiment thereof which has been found inpracit is to be understood that the same is susceptible of modificationin various particulars without departing from the spirit or scope of theinvention or sacrificing any of its advantages.

Ilaving thus described my invention what I claim as new and desire tosecure ters Patent, is

1. In an automatic stoker for a furnace a hopper, a hopper-bottom havinga transversev therein, a housing below saidfuel opening hopper bottomadapted to receive fuel from said hopper, a discharge nozzle for saidhousing mountedfor rocking movement with respect thereto, a tray abovesaid hopper bottom having its rear edge spaced from. the juxtaposed wallof said hopper to form a transverse opening, a manually operated valveco-a'cting with the rear edge of said hopper bottom,

tray to control the passage offuel through said transverse opening, asliding valve adapted normally to close the opening in said means forautomatically and interm ttently actuating said sliding valve, and meansfor automatically rocking said by Leton sald shaft and intersecting saidvertical discharge nozzle to distribute the fuel discharged therethroughuniformly over the entire surface of the fire bed of said furnace.

2. In an automatic stoker for a furnace, a hopper, a hopper bottomhaving a transverse fuel opening therein, a housing below said hopperbottom adapted to receive fuel from said hopper, a discharge nozzle forsaid housing mounted for rocking movement with respect thereto, a trayabove said hopper bottom having its rear edge spaced from the juxtaposedwall of said hopper to form a transverse opening, a manually operatedvalve coacting with the rear edge of said tray to control the passage offuel through said transverse opening a sliding valve adapte normally toclose the opening in said hopper bottom, means for automatically andintermittently opening said sliding valve to regu- Q late the passage offuel into said housing, means for automatically rocking said dischargenozzle to distribute the fuel discharged therethrough uniformly over theentire surface of the fire bed of said furnace, and means for propellingthe fuel through said discharge nozzle.

3. In a device of the character stated, a fuel hopper, a housing belowsaid hopper adapted to receive fuel from said hopper and having adischarge nozzle, a tray in sai hopper above said housing having itsrear edge'spaced from the juxtaposed wall of. said hopper to form atransverse opening, a manually operable valve for controlling thepassage of fuel through said transverse opening, means for actuatingsaid valve, a hopper bottom positioned below said tray and having anopening therein, a sliding valveadapting, vertically disposed, paralleldiscs fast on said shaft, a longitudinal propeller blade fast discs andmeans for revolving said shaft.

at. In a device of the character stated, a fuel hopper, a housing belowsaid hopper adapted to receive fuel therefrom and'having a lowerhorizontal discharge nozzle, a tray in said hopper having itsrear edgespaced from the juxtaposed wall of said hopper to form a transverseopening, a manually operable valve adapted to close said opening, meansfor opening said valve, a hopper bottom belowsaid tray having atransverse fuel opening therein,.a sliding valve, yieldable means,normally to maintain said valve above said opening to close the latter,means for automatically opening mined intervals, to permit theintermittent passage of fuel to said housing, means for said valve atpredeterpropelling the fuel from said housing through said dischargenozzle comprising a shaft, a longitudinal blade fast 'on said shaft andintersecting said discs and corresponding longitudinal parallelpartitions registering with said discs and extending through saidhorizontal discharge nozzle.

5. In a device of the character stated,

afuel hopper, a housing below said hopper adapted to receive fueltherefrom and having a lower horizontal fuel outlet, a tray in saidhopper having its rear edge spaced from the juxtaposed wall of saidhopper to form a transverse opening, a sliding opening, means foractuating said valve, a hopper bottom below said trav having atransverse opening therein, a sliding valve, yieldable means normally tomaintain said valve above said opening'to close thelatter.

' a pendant lever fulcrumed at its upper end and engaging said slidingvalve, a horizontal driving shaft in the lower portion Of'.SillClhousing, transverse, vertically disposed, parallel discs fast on saidshaft, a longitudinal blade fast on said shaft and intersecting saiddiscs, means for driving said shaft, a cam on said shaftadapted toengage the lower end of said lever intermittently to open said sliding.valve with each revolution of said shaft to fuel from said hopper tosaid housing, and longitudinal, parallel partitions having theirouterends registering with said discs and ex tending into and throughsaid horizontal fuel outlet to form well defined channels for thepassage of fuel discharged throughsaid out-.

let.

6 In a device of the character stated, a fuel hopper, a housing belowsaid hopper adapted to receive fuel from said hopper and having a lowerhorizontal outlet portion, a tray in said hopper having its rear edgespaced from the juxtaposed wall of said hop- 1 per to form a transverseopening, a valve to control the passage of fuel through said opening,means for actuating said valve, a hopper bottom below said tray havingan opening therein, a sliding valve adapted n mally to close ,saidopening to prevent the passage of fuel therethrough, means forautomatically and intermittently opening said valve, a shaft in thelower portion of said housing, tra nsverse, vertically disposed,parallel discs fast on said shaft, a longitudinal blade fast on saidshaft 'and'intersecting said vertical discs,

means for revolving said shaft, and a vertically' adjustable dischargenozzle positioned in said lower horizontal outlet.

7. In a device ofthe characterv stated, a

' fuel hopper, a housing below said hopper adapted to receive fueltherefrom and having valve adapted to regulate the passage of fuelthrough said permit the intermittent passage ofa lower horizontaloutlet, a tray in said hopper having its rear edge spacedfrom theopening, means for opening said valve intermittently and automaticallyto permit the intermittent passage of fuel through said opeI1- ing fromshaft in the lower portion of said housing, transverse, verticallydisposed, parallel discs fast on said shaft. a longitudinal blade faston said shaft and intersecting said Vertical discs adapted to propelsaid fuel, means for revolving said shaft, a vertically adjustabledischarge nozzle pivotally mounted said lower horizontal outlet, andmeans for rocking said discharge nozzle, tov distribute the fueldischarged therethrough over the entiresurface of the fire bed of afurnace."

. 8. I na device of the character stated, a fuel hopper, a housing belowsaid hopper adapted to receive fuel therefrom and having a lowerhorizontal outlet, "a tray in said hopper having its rear edge spacedfrom the juxtaposed wall of said hopper to form a transverse opening, avalve adapted to close said opening, means for actuating said valve, a

hopper bottom below said tray'havingan valve adapted norsaid hopper intosaid housing, a Y

for a. rocking movement therein, means for rocking said dischargenozzle, to distribute the fuel discharged therethrough over the a entiresurface of the fire bed of a furnace, parallel,- horizontally extendingpartitions havingtheir. outer ends adjacent to and in alignment withsaid vertical discs and their inner ends projecting through saiddischarge nozzle, and means said hopper to a support,

9. The combination of fuel hopper, a housing below said hopper adaptedto receive fuel therefrom and having a lower discharge outlet, saidoutlet being in alignment with an opening in said furnace wall, a trayhaving its rear edge spaced from the juxtaposed wall of said hopper toform a transverse opening, a valve for controlling the passage of fueltherethrough, means for actuating said valve, a hopper bottom below saidtray having an opening therein, a sliding valve for said opening, meansfor autoa furnace aw'all, a

matically and intermittently actuating said valve to permit intermittentpassage of fuel therethrough, a shaft in the lower portion of saidhopper, discs fast on said shaft, a longitudinal propeller fast on saidshaft and in-.' tersecting said discs, means for driving said shaft anda vertically adjustable discharge nozzle mounted Within said outletopening, and means for rocking said nozzle to distribute the fueldischarged therethrough uniformly over the fire bed of said furnace.

10. The combination of a furnace wall, a fuel hopper, a housing belowsaid hopper adapted to receive fuel therefrom and having a lowerhorizontal fuel outlet, said outlet being in alignment with a fuelintake opening in said furnace wall, a tray in said hopper having itsrear edge spaced from the juxtaposed wall of said hopper to form atransverse opening, a sliding valve coacting with said opening, tocontrol the passage of fuel therethrough, means for actuating saidvalve, a hopper bottom below said tray having a transverse openingtherein, a sliding 5 valve coacting with said opening, yieldable meansnormally to maintain the valve above said opening to close the latter, apendant lever fulcrumed at its upper end and engaging said slidingvalve, a .pro-

peller shaft in the lower portion of said hopper, means for driving saidshaft, vertically disposed, parallel discs fast on said shaft, alongitudinal blade fast on said shaft and intersecting said discs, a camon said shaft adapted to engage the lower end of said leverintermittently to 0 en said sliding valve, vertical, longitudina,parallel partitions having their outer ends registerin with said discsand extending into and t rough said horizontal outlet, a dischargenozzle positioned in said fuel outlet and means for rockiriig saiddischarge nozzle automatically to a 0rd uniform distribution of the fueldischarged therethrough over the entire surface 5 of the fire bed of afurnace. 4

v CILLO MARTINCICH.

